Biden kept Clinton's lead among poorer voters, did better among richer voters [View all]

[Recursion]

From the 2020 national exit polls by Edition Research (15590 interviews, including mail-in voters):

Households under $50K: Biden 55 / Trump 44
Households between $50K and $100K: Biden 57 / Trump 42
Households over $100K: Biden 42 / Trump 54

The 55/44 split on households making under $50K is about where Clinton landed in 2016. The 42 / 54 among rich households is slightly worse than Clinton did.

The big improvement was in the $50K - $100K demographic, which I have trouble calling the "working class" since it's entirely from the richer half of the country. But that's the demo Clinton lost and Biden won.